Which statements is not a valid comparison? A) Being the art director of a team designing a million dollar advertising campaign is like herding cats.

B) Studying art history is like making observations about a place you ve never seen except in pictures.

C) Using the principles of animation in a short cartoon is like sharpening a dull knife.

D) Expecting to become a self supporting artist in a short time is like expecting to become a famous singer after
one audition for American Idol.
Please help! (I know that A is not the answer)